Hydraulics & Fluid Mechanics
In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is

22.5 M/SEC
50 M/SEC
40 M/SEC
33 M/SEC

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Hydraulics & Fluid Mechanics
The shear stress distribution for a fluid flowing in between the parallel plates, both at rest, is

zero at the mid plane and varies linearly with distance from mid plane
constant over the cross section
zero at plates and increases linearly to midpoint
parabolic distribution across the section

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